Shizuki Minakami, Sakura Kusakabe's classmate and childhood friend, sports brown hair typically in pigtails and a standard middle school uniform. She is unique among Sakura's peers as the sole classmate who consistently believes him to be a good person, refusing to share the contempt others hold due to misunderstandings about his interactions with angels. Shizuki maintains a notably calm and normal demeanor, rarely showing surprise or excitement even amidst the chaos caused by the angels.

Harboring quiet affection for Sakura, she mirrors his own hesitation and struggles to confess her feelings. She spends considerable time with him, appearing to be someone he trusts, though their attempts at dating are constantly thwarted by interference from Dokuro and Sabato. Despite growing jealousy over Sakura's attention towards Dokuro, Shizuki demonstrates genuine concern for Dokuro's well-being. She openly questions Sakura's acceptance of Dokuro's violent behavior, reminding him of the ongoing pain and trouble Dokuro has caused him.

Throughout, Shizuki serves as a grounded voice of reason. No significant changes to her relationships or personal growth are depicted across the available media.